Enhancement of the rate of the hydrogen evolution reaction on polycristalline silver

G. I. LACCONI; A. S. GIODA; V. A. MACAGNO*

ELECTROCHIMICA ACTA

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 1985 vol. 30 p. 211 - 215

0013-4686

The changes produced by electrochemical treatments on the voltammograms, mainly those related to the enhancement of the rate of the hydrogen evolution reaclion on silver in alkaline solutions are described. Voltammograms do not yield a steady profile, at least up to 7 h of cycling. The current enhancements are analysed in terms of a minor contribution due to a roughness factor increase and of a major contribution involving highly reactive silver centres. The apparent + I reaction order with respect to OH- ions for the hydrogen evolution reaction is interpreted through the participation of (OH-), in the reaction pathway.